Sumber cahaya-spektrum penuh dan persepsi warna. Full-spectrum light sources will probably provide excellent color rendering. Indeks pemaparan warna (CRI) values for full-spectrum lighting sources are typically greater than 90. Color is a human perception constructed from the combination of the pengagihan kuasa spektrum (SPD) of the light source, the spectral reflectance of the materials being illuminated, and the tri-chromatic nature of the human visual system. If there are gaps or large variations in the SPD of a light source, there is a potential for confusion between the apparent colors of objects. Since full-spectrum light sources usually provide radiant power throughout the visible spectrum, subtle differences in the spectral reflectance characteristics of different objects are discernable. So, when color identification is part of the visual task, such as for graphic arts, museums and color printing applications, full-spectrum light sources will ensure good color discrimination.
Sumber cahaya-spektrum penuh dan prestasi visual. Sumber cahaya spektrum penuh-tidak akan memberikan prestasi visual yang lebih baik daripada sumber cahaya lain dalam kebanyakan keadaan. Prestasi visual ialah kelajuan dan ketepatan memproses maklumat akromatik (cth, cetakan hitam pada kertas putih) oleh sistem visual manusia. Pada tahap cahaya yang agak tinggi yang biasanya ditemui di sekolah dan pejabat, prestasi visual pada asasnya tidak terjejas oleh pengagihan kuasa spektrum sumber cahaya, jadi sumber cahaya spektrum penuh-adalah, lumen untuk lumen, tidak lebih baik daripada cahaya lain. sumber.
Lighting produced by full-spectrum lamps may be, however, perceived as providing brighter architectural spaces than other lamps (Boyce, 2002; Berman, 1990). Three factors may contribute to this effect. First, full-spectrum light sources typically have a high suhu warna berkorelasi (CCT) of 5000K - 7500K. Lamps with higher CCT values produce greater brightness perception than lamps with lower CCT of the same luminance. Second, most full-spectrum light sources have high color rendering properties, meaning that surface colors will appear more saturated. Greater saturation will also give the impression of greater brightness (Boyce, 1977). Third, the ultraviolet (UV) radiation produced by some full-spectrum fluorescent lamps has a fluorescing, brightening effect on textiles and paper that have been treated with whitening agents. These combined effects on brightness perception may indeed have positive impact on building occupants, but greater perceived brightness can also be a liability, depending upon the expectations of the space's occupants (Veitch and McColl, 2001).
Sumber cahaya-spektrum penuh dan kesihatan. Sumber cahaya spektrum penuh-tidak akan memberikan kesihatan yang lebih baik daripada kebanyakan sumber cahaya elektrik lain. Penyelidikan terkini menunjukkan bahawa aktiviti harian manusia sangat dipengaruhi oleh kitaran cahaya/gelap suria. Kitaran yang paling ketara dalam kitaran harian atau sirkadian ini ialah kitaran tidur/bangun; tetapi aktiviti lain termasuk kesedaran mental, mood, dan mungkin juga keberkesanan sistem imun melalui corak harian yang tetap. Cahaya ialah rangsangan alam sekitar yang paling penting untuk mengawal kitaran sirkadian ini dan menyegerakkannya ke hari suria. Cahaya gelombang pendek (biru) amat berkesan untuk mengawal selia sistem sirkadian; cahaya panjang gelombang (merah) nampaknya tidak berkaitan dengan sistem sirkadian. Oleh itu, untuk memaksimumkan kecekapan dalam mempengaruhi sistem sirkadian, sumber cahaya tidak seharusnya meniru spektrum penuh, sebaliknya harus memaksimumkan hanya panjang gelombang pendek. Walaupun sumber cahaya spektrum penuh-mengandungi cahaya panjang gelombang pendek dalam spektrumnya, ia tidak semestinya memastikan peraturan sirkadian yang betul kerana, sebagai tambahan, keamatan, pemasaan dan tempoh pendedahan cahaya yang betul adalah sama penting untuk peraturan sirkadian yang memuaskan (Rea et. al, 2002).
Light therapy treatment of seasonal affective disorder (SAD) usually involves regulated exposure to a white light source, commonly 10,000 lux at the eye for 30 minutes per day (Partonen and Lönnqvist, 1998). Any white light source will be effective at these levels (Lam and Levitt, 1999), so full-spectrum light source is in no way special for treatment of SAD.
Full-spectrum light sources have no demonstrable benefit for dental health. These claims have no scientific merit (McColl and Veitch, 2001). The section, "Is ultraviolet radiation production important?" gives more detail.
